Spelling corrections

A number of spelling corrections as reported by the codespell (see: https://github.com/codespell-project/codespell) program and lists.

Some remarks:
- not considered are grammatical errors
- not considered are names in the code although there are a number that could be improved (like `childs` -> `children`)
- in the documentation it could be made clearer what are variables and what is running text (e.g. by placing variables in running text between backticks)
- some comments are in the French language, I think it would be better to have them in the English (United States version).

1 files changed, 1 insertions, 1 deletions

diff --git a/src/Collapse/include/gudhi/Flag_complex_edge_collapser.h b/src/Collapse/include/gudhi/Flag_complex_edge_collapser.h
index c823901f..d0b3fe4a 100644
--- a/src/Collapse/include/gudhi/Flag_complex_edge_collapser.h
+++ b/src/Collapse/include/gudhi/Flag_complex_edge_collapser.h
@@ -53,7 +53,7 @@ struct Flag_complex_edge_collapser {
 #ifdef GUDHI_COLLAPSE_USE_DENSE_ARRAY
   // Minimal matrix interface
   // Using this matrix generally helps performance, but the memory use may be excessive for a very sparse graph
-  // (and in extreme cases the constant initialization of the matrix may start to dominate the runnning time).
+  // (and in extreme cases the constant initialization of the matrix may start to dominate the running time).
   // Are there cases where the matrix is too big but a hash table would help?
   std::vector<Filtration_value> neighbors_data;
   void init_neighbors_dense(){